Domenico Mazzocchi (1592 – 21 January 1665 in Veja, now ?Vejano, baptised in nearby Cività Castellana, in Lazio region's Viterbo Province) was an Italian Baroque composer of only vocal music, of the generation after Claudio Monteverdi. He was a learned Roman lawyer, studied music with Giovanni Maria Nanino ('Nanini'), also in Rome, and entered the service of cardinal Ippolito Aldobrandini in 1621. He is associated with providing music for the popes, particularly Cardinal Maffeo Barberini, later Pope Urban VIII, until Domenico's death in Rome on January 21, 1665.